Product Warranty (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013 years	Mar. 31, 2012	Dec. 31, 2012
Product warranty rollforward
Beginning balance, January 1	$ 64.9	$ 72.7
Provisions	11.6	10.0
Payments	(7.2)	(7.9)
Translation adjustment	(1.3)	1.9
Ending balance, March 31	68.0	76.7
Product warranty liability
Accounts payable and accrued expenses	35.0		33.1
Other non-current liabilities	33.0		31.8
Total product warranty liability	$ 68.0	$ 76.7
Minimum warranty term (in years)	1
Maximum warranty term (in years)	3